APA Edition Citation

Duffett-Smith,Peter, & Jonathan Zwart. (2011). Practical astronomy with your calculator or spreadsheet (4th.). CUP.

Chicago Edition Citation

Duffett-Smith,Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. 4th. Cambridge: CUP, 2011.

MLA Edition Citation

Duffett-Smith,Peter, and Jonathan Zwart. Practical Astronomy with Your Calculator or Spreadsheet. 4th. CUP, 2011.

Warning: These citations may not always be 100% accurate.